cardiovascular system :)

the major components of the cardiovascular system include the heart, blood and the blood vessels.

the heart is an organ that is actually two pumps working together to move blood. it's right pump moves blood collected from the body to the lungs, where oxygen is loaded and carbon dioxide is removed to be exhaled by the lungs while the left pump takes the freshly oxygenated blood and pushes it through the body so tissue cells can be kept healthy.


the blood is a form of connected tissue that has a fluid component called plasma and a variety of cells and substances. it also transports oxygen from the lungs, nutrients and fat cells from the digestive system and hormones from the endocrine glands to approximately 75 million cells in the body. amazing. right? :)



so there are three types of blood vessels. arteries, veins and capillaries.
arteries carry blood away from the heart while the veins carry blood to the heart. and the capillaries allows for the transfer of oxygen and nutrients to the tissues in the body.

whew. this lesson is particularly long and complicated (for me). so in teaching this kind of lesson, its nice to have organizational concept maps to sum up all of the important detail. the reporter did a very good job. :)

ok. that's all.. thank you :))

--angel♥